-wiese



(No Model.) 3 Sheets-Sheet 1. G. A. WIESE.

I ELECTRIC AROLAMP. No. 373,761. Patented Nov. 22, 1887.

3 SheetsSheet 2.

G. A. WIESE.

ELECTRIC ARC LAMP..

(No Model.)

, No. 373,761. Patented Nov. 22, 1887.

(No Model.) 3 sheets-sheet 3.

G. A. WIESE.

ELECTRIC ARC LAMP. I No. 373,761. Patented Nov. 22, 1887.

N. PETERS. Phuln Lilhugmplmr. \Vnslvillgmn. u c.

UNITED STATES PATENT Cation.

GUSTAV A. WIESE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO ADOLPH WVESKE, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 373,761, dated November 22, 1887.

Application filed March 22, 1887. Serial No. 232,002. (No model.)

-.T all whom it may concern.-

justment of the carbons is effected by means of solenoids with electrical currents of unequal resistance; and it consists of certain novel devices by which the carbons are automaticallyadjusted to produce the proper are, a rnechanismin connection with the arc-regulatingsolenoids, by which the unequal resistance of the two is utilized to cut the lamp out of the circuit in case of accident.

My invention further relates to an automatic stop and releasing mechanism, whereby the carbons of a double lamp are broughtinto the circuit, so as to burn successively and continuously.

itelerring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a view of my apparatus, showing the mechanism for actuating the double set of carbons and a means for throwing the second set into operation when the first set are burned out. Fig. 2 is a longitudinal vertical section through the two solenoids, showing the arrangement of the cut-out armature. Fig. 3is a plan view of the same mechanism, the top plate being taken off. Fig. 4. is an enlarged view showing the escapement mechanism and stop U. Fig. 5 is a view of the cut-out or short-circuiting device.

A A are the side rods of an electric-arc lamp, having the lower ends united by a yoke, B, in the center of which the sockets C C are fixed to support the lower or negative'carbons of the two sets for electric-arc lighting, these carbons being secured by set-screws or other suitable means and having the negative wire D connecting with the two. This wire, for convenience, is led up through one of the side rods, A, to the lower plate, E, which supports the regulating mechanism, and is thence carried upward and outward through the suspending-rod, so as to be connected with the circuit in the usual manner. Upon the lower plate or table, E, to which the side rods, A, are secured, is supported the regulating mechanism which comprises the two solenoids F and G, placed one above the other and separated a short distance apart, the two being formed so as to present unequal resistances to the passage of an electrical current, and having a core or armature, M, the ends of which extend a short distance into each solenoid, so as to be acted upon by either one or the other as the strength of the current in the two varies. Connected with the central portion of this core is one end of a horizontal rocking or oscillating frame, I, which is pivoted or fulcrumed bet-ween the two posts J, extending between the lower and upper plates, E and E. Across this frame extends a shalt which is journaled in both sides of the frame, and has upon it the pinions K K, the teeth ofwhich engage the racks of the two stems L and L, which-pass vertically through the upper and lower plates, E E, which serve as guides and have the lower end adapted to carry the positive carbons of the two sets, which correspond with the negative carbons previously described and held in the lower yoke. These pinions turn loosely in one direction upon the shaft, so that they will rotate freely when the rods carrying the carbons are raised, and by means of pawls engaging ratchet-wheels upon the shaft the shaft is caused to turn when the carboncarrying rods are descending.

Upon one end of the pinionshaft is fixed a gear-wheel, H, and this engages with a pinion, N, upon the shaft 0, the escapement wheel P being fixed upon the same shaft. This shaft and escapement are upon the opposite side of the fulcrum-frame from the shaft carrying the pinions by which the carbonoarrying rods L are controlled. The escapement Q is pivoted in the frame, so that the points of its teeth will engage the escapementwheel, thus allowing it to move by the vibration of the escapement, which allows the teeth to escape alternately. Upon the shaft of the escapement is fixed a hub, which has projecting downwardly from it a plate, R, and from the upper end projects a rod having a weight,

S, which may be adjusted up or down upon IOO the rod and fixed by a set-screw T, at any desired point, so as to regulate the rate of vibration of the escapement.

U is a stop against which the lower plate, B, may strike when the tilting frame is moved about its fulcrum, so as to depress its rear end, upon which the escapement is fulcrumed. This stop is made adjustable by means of a screw, and set nearer to or farther away from the plate at will, thus regulating thepoint at which the movement of the gearand carbons will be stopped, so that the frame may oscillate a short or long'tlistauce to produce this result. The hub from which the stop-plate projects is also secured to its shafts by a set-screw, and the position of the plate may be adjusted with relation to the stop U by this screw.

Connected with one end'of the oscillating frame I by a link is one end of a lever-arm, V, which is fulcruined to the top plate, E, of the apparatus and has its long arm screw-threaded to receive a weight, WV, which fits the screwthreads and may be turned to any position so as to act as a counter-balance of greater or less force.

The solenoid F consists of a coil of wire of sufficient size to convey the current of electricity which is led into it from the positive wire and passes out through the arc-carbons and negative wire by means of its connection with the plate, as shown. The solenoid G is made of a much finer wire, which offers considerable resistance to the passage of the current, and this coil is also connected with the positive-current wire D at a, while the opposite end of the wire composing this coil is connected with the negative-current wire at b. The operation of this mechanism is fully described in an application for a patent filed by me November 27, 1886. The varying action of the current in the two solenoids is such as pose.

to move the end of the horizontal oscillating frame up or down, so as to stop the downward movement of the carbon-carrying rods when the positive and negative carbons are at sufficient distance from each other, and to set them in motion again when the are has become too long.

111 case of breakage of a carbon or accident to a lamp which renders it necessary to throw it entirely out ofthe circuit, while at the same time allowing the current to pass on so as not to interfere with the other lamps in the circuit, I employ a mechanism for cutting the current off from the carbons and passing it directly through thelamp, which is constructed as follows: Through the lower part of the coil G an opening is formed which allows ashort core, 0, to pass up into it from below, this coil being set up on an arch or support a sufificient distance above the lower plate, E, for this pur- Gonnected with this core 0, either bya hole made through it or otherwise, is one end ofa lever, d, which is fulcrumed atf upon a post, as shown. The opposite end of the lever is beveled and engages a similarly-beveled stud, g, projecting from a spring, h, which is fixed to a post, i. Beneath this end of the lever (1 is a metallic block, j, which, together with the fulcrum and spring-supporting posts before described, are insulated from thelower plate, E, by means of a non-conducting piece, 70, so that there is no communication between either of these or between them and the plate while the lever is held up by the spring. The

insulated blockj is connected by a wire, Z, di-

rectly with the negative wire of the circuit, and the fulcrunrpost'is connected by the wire m directly with the positive wire of the circuit at the point it. These two wires are of sufficient size to convey the whole current, when the proper connection is made, and cut the lamp out of the circuit. The operation of this device will then be as follows: If the carbon becomes broken or any accident happens which greatly increases the resistanceto the main current passing through the upper coil, G, and thence through the carbons, a larger portion ofthis current will pass through the coil F of higher resistance, and its power will be so increased that it will act upon the core or armature 0, thus drawing it up into the coil and overcoming the tension of the spring-stud against which the opposite end of the lever is supported. This end of the lever is brought down upon the metallic block j, thus completing the connection between the fulcrum-post with which the positive wire is directly connected and the block j,\vith which the negative wire is connected. This allows the main portion of the current to pass through the apparatus by means of this connection without passing through the carbons, and the lightis thus cutoff without interfering with any other lamp in the circuit. The end of the lever is formed with a double incline, and the spring-stud g, which engages it, has a similar double incline upon its end, so that when the lever is above the stud it is supported by the two inclined surfaces then in contact; but when the magnetic coil has acted so as to draw the armature up and force this end of the lever down beneath the studthe two opposite inclined surfaces will be in contact, and then the lever will thus be held down,although the influence of the magnetimmediately ceased when the new connection. was made. This prevents the armature or core from dropping and thus throwing the lamps into the circuit again. The tension of the spring h, by which the lever is held up, may be regulated by means ofa set-screw, 0. By this mechanism I am enabled to cut the lamp out of the circuit at any time by very simple devices and the use of no other coils but those of varying resistance by which the position of the carbons are regulated.

Vhen the lamps have to remain lighted for a long time, as one set of carbons will only last a certain length of time, it is necessary to make some provision for throwing another set of carbons into the circuit as soon as the first ones have burned out. In order to hold the second carbon-carrying rod out of the circuit while the first one is in operation, the back of the rod is notched, so as to allow the end of the lever p, which is fulcrumed close to it upon the top of the plate E, to enter the notch and thus hold the rod up. The lever passes across the back of the other carbon-carrying rod, against which it rests, being held in contact'with it by a light spring, g, which does the first one has burned out.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The horizontally-fulcrumed frame, with escapen1ei1t and gearing whereby the movement of the positive carbon-carrying rod is regulated, the two magnetic coils, one of low resistance in the main circuit and one of high resistance in a shunt around it, arranged axially in a vertical line andhaving a core or armature oscillating between them and connected with one end of the vibrating frame, so that by the varying action of the coils the frame is vibrated to arrest the carbon or allow it to move forward, in combination with a second armature or core which is operated by the coil of a higher resistance, a lever connected with said armature and l'ulcrumed in an insulated post, to which one of the main wires of the lamp is directly connected outside of the coils, an insulated block with which the other wire is connected, so that when the armature is moved by the increased magnetic action of its coil the lever will make connection between these two wires and exterior to the lamp-circuit, substantially as herein described.

2. The magnetic coils of high and low resistance, having a core or armature upon which both may act, and which is connected with a horizontally-fnlcrumed and vibrating frame carrying an escapement by which the movementof the carbons is regulated,asecond core or armature which is actuated by the magnetic coil of higher resistance when a sufficient current passes through it, a lever fulcrnmed in an insulated post, with which an independent wire connects one of the main wires of the lamp exterior to the lainpcircuit, and through which this current is transmitted to the opposite wire of the lamp when the lever is moved so as to come in contact with it, in combination with a spring, whereby the end of the lever is held out of contact with the block until the current overcomes the pressure of the spring, and by which it is retained in contact with the block after the current ceases, substantially as herein described.

3. The lever fulcrumed in a post and having one end connectbd with the supplemental core or armature of the arc-regulating coils and the other end movable so as to make or break an independent circuit between the positive and negative wires of the lamp and out side of the lamp-circuit, in combination with the spring having the double-inclined stud or spur, which engages with the corresponding double inclines upon the end of the lever to retain the lever out of contact with the block until it has been actuated by the armature and to retain it in contact with the block after the magnetic current ceases, substantially as herein described.

4. In combination with the main and shunt magnets of an arc light, an independent armature for the shuntmagnet, a current-shifting lever having one end connected with said in dependent armature, a spring pressing upon the lever to retain it out of contact until it is acted upon by the armature and thereafter retain it in contact when the current has ceased, and a screw or device to regulate the tension of the spring, substantially as herein described.

In witness whereof I have hereunto set my hand.

GUSTAV A. WIESE.

Witnesses:

S. H. NoURsE, H. 0. LEE. 

